Binding-post for electrical connections.



No. 669,5I7. Patented Mar. I2, l90l. A. FISCHER.

BINDING POST FOR ELECTRICAL CONNECTIONS.

(Applicttion filed Fab. 19, 1900.)

(No Nodal.)

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UNITED STATES PATENT Fries,

ALEXANDER FISCHER, OF NEW YORK, N. Y.

BINDING-POST FOR ELECTRlCAl. GQNNECTlONS.

SPECIFICATION forming part of Letters Patent No. 669,517, dated March 12, 1901.

Application filed b a y 19, 1900, Serial No. 5,771. (lilo moden) To all whom it may concern.-

Be it known that I, ALEXANDER FISCHER, a citizen of the United States of America, and a resident of New York city, New York county, State of New York, have invented a new and Improved Binding-Post for Electrical Connections, of which the following is a specification.

Myinvention relates to binding-posts for electrical apparatus, and is more specifically designed to produce an efficient and convenient form of binding-post for use upon vehicles where the electric current is employed to produce a spark which shall ignite the or oil used in the engine driving said vehicle.

The preferred form of construction embodying my invention is illustrated in the accompanying drawing.

A casing 1 is provided, preferably cylindrical in form, as shown, and preferably made of gutta-percha or similar substance, though any non-conducting material might be employed. This casing is liquid-tight. Upon the upper part of the casing are mounted several binding-posts, such as shown at 2. These binding-posts are each covered by non-conducting caps 3 3, which fit over the bindingposts and down upon the non-conducting base formed by the wall of the casing 1. These non-conducting caps 3 3 may be held on in any suitable Way, but as shown they are internally threaded to mesh with the external screw-thread on the binding-posts. Each of these binding-posts is hollowed out longitudinally, having an opening 4;, which fiaresin- Wardly. Flexible conductors 5 5 properly insulated, have their metallic portions inserted in the longitudinal openings 4, and preferably the wires constituting said conductors have slit ends, (shown at 6,) which expand to fit the inwardly-flaring opening et, and thus tend to prevent any withdrawal of the conductors from the binding-posts except upon the exertion of considerable force. The electric conductors to which these bindingposts are connected may be of any character, but said binding-posts are of special usefulness on the form of contact-breaker shown in the drawing. Within the casing the metallic connection 7 extends from one bindingpost to the binding-post 8, upon which is mounted the movable metallic link 9, preferably carrying the friction-roller 10 and the contact-point 11 on its free end. There is an adjustable coi'itnct-screw 12 upon the binding-post 13, which latter is connected by the metallic link 14: with theother exterior binding-post 2.

15 is a cam interiorof the casing l,n1ouuted on shaft 16, projecting through said casing and adapted to cooperate with the friction-roller 10 to force the movable link 9 down, so that the contact-points ll and 12 will touch intermittently. The shaft 16 is rotated in any suitable way, as by the gear 17, meshing with a train of gearing, a portion of which is shown in dotted lines l8.

19 is an opening in the upper part of the casing 1, in which oil may be introduced. This opening may be plugged up in anysuitable manner after the oil is in the casing.

The operation of the above-described apparatus is as follows: The parts being assembled, as shown, the Wires 5 5 form the terminals of an electriccirouit, usually, as before stated, the primary circuit of an induction-coil. The wires orother attachments prevent the casing 1 from rotating; but the mechanism of the engine causes the shaft 16 to rotate and with it the cam 15. This presses down the movable link or spring 9, so that the circuit is closed by the contact-pins 11 and 12 being pressed together for a short period of time. During the other portions of the revolutions of the cam the contact is broken by the spring 9 lifting the contactpin 11 away from the adjustable contact-point 12. The period of contact can be varied by adjusting the contact-pin 12.

In taking oi the apparatus the conductors 5 5 can be pulled out of the binding-posts 2, the cover or face of the casing l removed, the cam 15 taken off, and the whole apparatus slid off the end of the shaft.

The mode of attachment to the binding post 2 by the split pin 6 and flaring opening a, is particularly convenient for making and breaking the connection in cases of repair or replacement, and the split pin 6 cannot be jarred out of the binding-post, as will occur in any positive screw connection under the rapid and continuous jarring given to a motorvehicle.

It is evident,of course, that various changes could be made in the details of construction disclosed without departing from the spirit. and scope of my invention so long as the relative arrangement of parts or the principle of operation is preserved.

The gutta-percha caps 3 3 protect all parts from dirt and moisture and in cooperation with the non-conducting coverin of rubher or similar material on the wires 0 5 form a casing substantially liquid and air tight, through which the wires may pass to the interior of the casing 1 without permitting any of the contained oil to escape or any dirt or moisture to enter.

I do not herein claim the above-described form of circuit-breaker, but have illustrated the same as a typicalform of circuit-breaker operating in a liquid-tight casing containing oil, employed by me on motor-vehicles and in combination with which my improved bin ding-post finds its most important use, as it notonly aifords a positive electric connection to the internal circuits of said circuit-breaker, but also prevents any waste of oil from the interior thereof by reason of the liquid-tight caps 2 2. Of course the binding-post maybe used with other forms of circuit-breaker or for affording convenient electric connections to entirely different forms of apparatus.

Having therefore described my invention, what I claim as new, and desire to protect by Letters Patent, is

1. The combination of the binding-post having a longitudinal opening, the base of nonconducting material in which said bindingpost is set, the metal plug adapted to be inserted in the outer end of said binding-post, and the cap of non-conducting material adapted to fit over said binding-post, around said plug, and down upon the non-conducting base.

2. The combination of the binding-post having a longitudinal opening flaring inwardly, and the electrical conductor provided with a split pin adapted to be inserted and expand in said inwardly-flaring opening.

3. The combination of the binding-post having a longitudinal opening flaring inwardly and the electrical conductor provided with a split pin adapted to be inserted and expand in said in wardly-fiaring opening,together with the base of non-conducting material in which said binding-post is set, and the cap of nonconducting material adapted to fit over said binding-post and down upon the nonconducting base.

4. The combination of the binding-post having a longitudinal opening flaring inwardly, and the electrical conductor provided with a split pin adapted to be inserted and expand in said i mvardly-iiaring opening,togeth er with the base of non-conducting material in which said binding-post is set, and the cap of nonconducting material, provided with an internal screw-thread which meshes with an external thread on the bindingpost, whereby the cap is held on the binding-post and forced down upon the non-conducting base.

5. The combination of a binding'post having a longitudinal opening, the liquid-tight casing of non-conducting material, into the wall of which the binding-post is set, the electrical conductor adapted to be inserted in the outer end of said binding-post, the cap of nonconducting material adapted to fit over said binding-post around said electrical conductor and down upon the non-conducting casing, and the covering of non-conducting material for said conductor abutting against the top of the cap of non-conducting material.

Signed by me at Jersey City, New Jersey, this 14th day of February, 1900.

ALEXANDER FISCHER.

Witnesses:

GEO. B. ADAMS, W. H. PUMPHREY. 

